/*
 * JBoss, Home of Professional Open Source
 * Copyright 2011, Red Hat, Inc. and individual contributors
 * by the @authors tag. See the copyright.txt in the distribution for a
 * full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

/*
 * 15/07/13 - Change notice:
 * This file has been modified by Mobius Software Ltd.
 * For more information please visit http://www.mobius.ua
 */
package ua.mobius.media.server.impl.dsp.audio.l16;

import ua.mobius.media.server.spi.format.Format;
import ua.mobius.media.server.spi.format.FormatFactory;
import ua.mobius.media.server.spi.memory.ShortFrame;
import ua.mobius.media.server.spi.memory.ByteFrame;
import ua.mobius.media.server.spi.memory.ShortMemory;

/**
 * 
 * @author oifa yulian
 */
public class Decoder {

    private final static Format linear = FormatFactory.createAudioFormat("linear", 8000, 16, 1);

    private int i,j;
    private byte[] data;
    private short[] resData;
    
    public ShortFrame process(ByteFrame frame)
    {
    	data=frame.getData();
    	ShortFrame res = ShortMemory.allocate(data.length/2);
    	resData=res.getData();
    	
    	for(i=0,j=0;i<data.length;i+=2)
    		resData[j++]=(short) (((data[i + 1]) << 8) | (data[i] & 0xff));
		
        res.setOffset(0);
        res.setLength(resData.length);
        res.setTimestamp(frame.getTimestamp());
        res.setDuration(frame.getDuration());
        res.setSequenceNumber(frame.getSequenceNumber());
        res.setEOM(frame.isEOM());
        res.setFormat(linear);
        return res;
    }      
}
